Concrete internal defect detection device

Abstract

The utility model provides a concrete internal defect detection device, which relates to the technical field of concrete detection and comprises a shell, a handheld handle is arranged on the shell, one surface of the shell, which is attached to concrete, is of an opening structure, and rollers are rotatably mounted at four corners of the shell; a pair of knocking heads are arranged, and a guide rod is fixedly arranged on each knocking head and penetrates through the shell in a sliding manner; the driving part is used for periodically driving the pair of knocking heads to knock the concrete wall surface; the sound wave receiving part is arranged on the shell and used for collecting concrete reverberation signals generated after knocking in the shell and outputting the signals after noise filtering is conducted on the signals. The device has the advantages of being convenient to operate and low in cost, the detection cost and the use threshold can be reduced, and the detection efficiency of an engineering site is improved.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing technology, and more specifically, to a device for detecting internal defects in concrete. Background Technology

[0002] Concrete is a widely used structural material in building, bridge, and road engineering. Its internal defects (such as honeycomb, voids, cracks, inclusions, and debonding) can affect the safety and service life of the structure. Therefore, the detection of internal defects in concrete is crucial.

[0003] Currently, common methods for detecting concrete defects include infrared thermography, ultrasonic testing, and X-ray inspection. While these methods can identify defects to a certain extent, they generally suffer from high equipment costs and complex inspection processes. For example, infrared thermography and X-ray inspection equipment are expensive, have high maintenance costs, and require specific environmental conditions. Although ultrasonic testing is relatively common, it requires specialized equipment and relies on professional personnel for operation and data analysis, increasing the cost of use. Utility Model Content

[0004] The purpose of this invention is to provide a concrete internal defect detection device that is easy to operate and inexpensive, thereby reducing detection costs and lowering the barrier to entry, and improving on-site detection efficiency.

[0005] This utility model is achieved through the following technical solution:

[0006] A device for detecting internal defects in concrete, comprising:

[0007] The housing has a hand handle, the side of the housing that is in contact with the concrete has an open structure, and the four corners of the housing are rotatably mounted with rollers;

[0008] The striking heads are in pairs, and each striking head is fixedly provided with a guide rod, which slides through the housing.

[0009] A driving element for periodically driving the pair of striking heads to strike a concrete wall surface;

[0010] A sound wave receiver is disposed on the housing and is used to collect the echo signal of the concrete after being struck inside the housing, and output the echo signal after noise filtering.

[0011] Furthermore, each guide rod is equipped with an elastic element, which is used to drive the striking head to impact the concrete wall surface.

[0012] Furthermore, the driving component includes a pull rod, a limiting rod, and a first spring. The pull rod has insertion slots at both ends. The limiting rod is slidably inserted into the insertion slots. The first spring is disposed in the insertion slots, with one end connected to the bottom wall of the insertion slot and the other end fixedly connected to the limiting rod.

[0013] The hand handle is 'n' shaped, and both ends of the hand handle have guide grooves along the length direction. One end of the limiting rod is slidably connected in the guide groove. The guide groove includes a guide surface and an unlocking slope. The unlocking slopes on both sides are not located on the same plane.

[0014] The limiting rod is provided with an unlocking hole and a limiting hole, and the unlocking hole and the limiting hole are connected to each other;

[0015] The guide rod is fixedly provided with a pull end at the end away from the striking head. The diameter of the pull end is the same as the diameter of the unlocking hole. The diameter of the limiting hole is smaller than the diameter of the pull end. The end of the pull end away from the striking head is cone-shaped.

[0016] The unlocking ramp is used to drive the limiting rod to slide axially along the guide groove so that the unlocking hole is aligned with the pulling end, thereby unlocking the pulling end.

[0017] Furthermore, the bottom walls of both the unlocking hole and the limiting hole are provided with guide bevels;

[0018] And / or, the elastic element includes a second spring, which is sleeved on the guide rod, located inside the housing, with one end of the second spring fixedly connected to the striking head and the other end fixedly connected to the housing.

[0019] Furthermore, a magnetic ring is embedded in the housing at the position where it protrudes from the guide rod, and a metal ring that can attract the magnetic ring is fixedly disposed on the guide rod.

[0020] Furthermore, the sound wave receiver includes a pair of high-sensitivity microphones, the sound input ends of the pair of high-sensitivity microphones are respectively arranged facing the striking head, the sound output ends of the high-sensitivity microphones are located on the outside of the housing, and the high-sensitivity microphones are equipped with noise filtering elements.

[0021] Furthermore, a rubber ring is fixedly provided circumferentially at the opening position of the housing.

[0022] Furthermore, the opening of the housing is radially tapered inward.

[0023] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0024] 1. This utility model improves the convenience and economy of detecting internal defects in concrete through optimized structural design. Its handheld housing structure and four-corner rotating rollers facilitate sliding and positioning of the device on the concrete surface, reducing manual handling and significantly improving operational convenience and on-site testing efficiency. The simple mechanical cooperation between the striking head and the guide rod makes the device structure more concise, avoiding complex electronic or high-cost components, thereby reducing manufacturing costs. Furthermore, the acoustic receiver effectively improves the accuracy of the detection results by collecting echo signals and filtering noise, while reducing reliance on professional personnel and lowering the operational threshold. Overall, this device can significantly reduce testing costs while maintaining a certain level of detection accuracy, meeting the needs of widespread application in engineering sites.

[0025] 2. This utility model improves the fit with the concrete surface by fixing a rubber ring circumferentially at the opening of the shell, preventing slippage or damage to the concrete surface during use, while enhancing the sealing performance and ensuring the stability and effectiveness of the testing process. Attached Figure Description

[0026] Figure 1 A schematic diagram of the overall structure of a concrete internal defect detection device provided by this utility model;

[0027] Figure 2 This utility model is intended to show the internal structure of the shell and the rod.

[0028] Figure 3 Exploded view of a concrete internal defect detection device provided by this utility model;

[0029] Figure 4 This utility model aims to demonstrate the state in which pulling the end head causes the two limit rods on both sides to move closer together, thereby allowing the pulling end head to enter the unlocking hole;

[0030] Reference numerals: 1-Housing, 10-Handle, 11-Rod, 111-Guide groove, 1111-Guide surface, 1112-Unlocking ramp, 12-Roller, 2-Striking head, 21-Guide rod, 211-Elastic element, 2111-Second spring, 212-Pull end, 23-Metal ring, 3-Driver, 31-Pull rod, 311-Insertion groove, 32-Limiting rod, 321-Unlocking hole, 322-Limiting hole, 3221-Guide ramp, 33-First spring, 4-Sound wave receiver, 41-High sensitivity microphone, 5-Magnetic ring, 6-Rubber ring;

[0031] B - The direction of movement of the limit rod. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] Example

[0035] The following is for reference Figures 1-4 As shown in the illustration, and further explained with reference to specific embodiments, this embodiment provides core structures including a housing 1, a striking head 2, a driving component 3, and a sound wave receiver 4. Specifically, the housing 1 is square and has a handle 10 for easy operation. The side of the housing 1 that is in contact with the concrete has an open structure, and the opening of the housing 1 tapers radially inward to create a certain sound wave focusing effect and improve detection accuracy. To enhance the mobility of the device, rollers 12 are rotatably mounted at the four corners of the housing 1, allowing it to move smoothly along the concrete wall during the detection process.

[0036] The striking heads 2 are a pair, and each striking head 2 is fixedly provided with a guide rod 21. The cross-section of the guide rod 21 is circular, but it can also be square, elliptical, or polygonal to adapt to different installation requirements. The guide rod 21 slides through the outer shell 1, so that the striking head 2 can reciprocate along the direction of the guide rod 21 to achieve periodic striking of the concrete wall surface.

[0037] The driving component 3 is used to drive the striking head 2 to periodically strike the concrete wall. The driving component 3 can be implemented in various ways, including: 1. Electromagnetic drive: using an electromagnet as the driving source, the electromagnet generates magnetic force to attract or repel the striking head 2, causing it to reciprocate; 2. Pneumatic drive: using a cylinder as the driving source, the extension and retraction of the striking head 2 is controlled by air pressure to achieve periodic striking; 3. Mechanical cam drive: using an eccentric wheel or cam mechanism, the motor drives the eccentric wheel to rotate, causing the striking head 2 to reciprocate along the guide rod 21.

[0038] Reference Figure 2 and Figure 3As shown, each guide rod 21 is equipped with an elastic element 211. One end of the elastic element 211 is fixedly connected to the guide rod 21, and the other end is connected to the striking head 2. The elastic element 211 is in a pre-compressed state to provide a rebound force when the force is released, thereby driving the striking head 2 to move at high speed along the axial direction of the guide rod 21 and impact the concrete wall surface, achieving effective striking. At the same time, the elastic element 211 can provide a return function after the striking ends, allowing the striking head 2 to quickly return to its initial position after the impact, preparing for the next striking, thereby improving striking efficiency and continuity. In different embodiments, the elastic element 211 can be selected by pneumatic drive or pneumatically driven methods, etc.

[0039] Reference Figure 2 and Figure 3 As shown, the driving component 3 includes a pull rod 31, a limiting rod 32, and a first spring 33. The pull rod 31 has insertion slots 311 at both ends. The limiting rod 32 is slidably inserted into the insertion slots 311. The first spring 33 is located in the insertion slots 311, with one end connected to the bottom wall of the insertion slots 311 and the other end fixedly connected to the limiting rod 32. The hand handle 10 is 'n'-shaped. Both ends of the handle 10 have guide slots 111 along the length direction. One end of the limiting rod 32 is slidably connected to the guide slot 111. The guide slot 111 includes a guide surface 1111 and an unlocking slope 1112. The two unlocking slopes 1112 are not located on the same plane, so that the striking head 2 can strike the wall intermittently. The limiting rod 32 has an unlocking hole 321 and a limiting hole 322, which are interconnected.

[0040] The end of the guide rod 21 away from the striking head 2 is fixedly provided with a pull end 212. The diameter of the pull end 212 is the same as the diameter of the unlocking hole 321, and the diameter of the limiting hole 322 is smaller than the diameter of the pull end 212. The end of the pull end 212 away from the striking head 2 is conical. The unlocking inclined surface 1112 is used to drive the limiting rod 32 to slide axially along the guide groove 111 so that the unlocking hole 321 is directly opposite the pull end 212, thereby unlocking the pull end 212.

[0041] Reference Figure 4As shown, in the specific working process, in the initial state, the pull end 212 is engaged in the limiting hole 322, keeping the guide rod 21 in its original position. When the operator pulls the pull rod 31, because the diameter of the limiting hole 322 is smaller than the diameter of the pull end 212, the pull rod 31 will drive the guide rod 21 and the striking head 2 away from the concrete wall. At the same time, the limiting rod 32 slides axially under the action of the guide groove 111, gradually moving towards the unlocking slope 1112. Under the guidance of the unlocking slope 1112, the two limiting rods 32 will further retract until the unlocking hole 321 is directly opposite the pull end 212, so that the pull end 212 can smoothly pass into the unlocking hole 321, realizing the unlocked state. Under the action of the elastic element 211, the striking head 2 can then strike the concrete wall. Meanwhile, since the end of the pulling head 212 away from the striking head 2 is cone-shaped, during the process of direct contact with the limiting hole 322 (the moving direction B of the limiting rod 32), the pulling head 212 will be guided into the unlocking hole 321. After the pulling head 212 passes through the unlocking hole 321, under the action of the first spring 33, the limiting rods 32 on both sides will move away at the same time, and the pulling head 212 will be re-engaged into the limiting hole 322, so that the striking head 2 is reset and ready for the next operation.

[0042] As an optional embodiment, the bottom walls of both the unlocking hole 321 and the limiting hole 322 are provided with guide slopes to guide the pointed end of the pulling end 212.

[0043] As an optional embodiment, the elastic element 211 includes a second spring 2111, which is sleeved on the guide rod 21 and located inside the housing 1. One end of the second spring 2111 is fixedly connected to the striking head 2, and the other end is fixedly connected to the housing 1.

[0044] Furthermore, a magnetic ring 5 is embedded in the housing 1 at the point where it protrudes from the guide rod 21, and a metal ring 23 that can attract the magnetic ring 5 is fixedly mounted on the guide rod 21. The metal ring 23 can be made of iron-nickel alloy or electromagnetic stainless steel to ensure a good magnetic adsorption effect. It should be noted that the elastic force of the second spring 2111 should be much greater than the magnetic force of the magnetic ring 5 and the metal ring 23. This ensures that during the striking process, the guide rod 21 can still smoothly drive the striking head 2 to impact the wall normally to complete the predetermined task. After the striking is completed, the magnetic attraction between the magnetic ring 5 and the metal ring 23 can provide a certain buffering force during the rebound of the guide rod 21, thereby reducing the repeated rebounds of the striking head 2 due to inertia, improving striking stability, reducing the impact of mechanical vibration on the equipment, and preventing fatigue damage to the guide rod 21 and related components due to frequent impacts, thus improving the overall service life.

[0045] Reference Figure 1 and Figure 2As shown, the sound wave receiver 4 includes a pair of high-sensitivity microphones 41. The sound input ends of the high-sensitivity microphones 41 are respectively mounted facing the striking head 2 to facilitate accurate acquisition of sound wave signals during the striking process and improve the sound signal acquisition effect. The sound output ends of the high-sensitivity microphones 41 are located on the outside of the housing 1 so that the staff can hear and analyze them in a timely manner. To reduce the impact of environmental noise on the detection accuracy, the high-sensitivity microphones 41 are equipped with noise filtering elements. These noise filtering elements can use multi-layer filtering materials or digital signal processing technology to effectively reduce the interference of external environmental noise and improve the clarity and accuracy of the striking sound wave signal.

[0046] Reference Figure 1 As shown, a rubber ring 6 is fixedly bonded circumferentially to the opening of the housing 1. The rubber ring 6 can be made of wear-resistant and shock-absorbing rubber material to enhance the sealing of the housing 1, prevent external noise interference, and prevent dust or impurities from entering the housing 1 and affecting the normal operation of the device. In addition, the rubber ring 6 can also play a role in buffering and shock absorption during equipment operation, reducing the vibration amplitude of the housing 1 caused by impact, improving the service life of the equipment, and enhancing operational stability.

[0047] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for detecting internal defects in concrete, characterized in that, include: The housing (1) is provided with a hand handle (10), the side of the housing (1) that is in contact with the concrete is open, and the four corners of the housing (1) are rotatably equipped with rollers (12); The striking head (2) is a pair, and each striking head (2) is fixedly provided with a guide rod (21), which slides through the housing (1); A driving element (3) is used to periodically drive the pair of striking heads (2) to strike the concrete wall surface; A sound wave receiver (4) is disposed on the housing (1) and is used to collect the echo signal of the concrete after being struck inside the housing (1) and output the echo signal after noise filtering.

2. The concrete internal defect detection device according to claim 1, characterized in that, Each guide rod (21) is provided with an elastic element (211), which is used to drive the striking head (2) to impact the concrete wall.

3. The concrete internal defect detection device according to claim 2, characterized in that, The driving component (3) includes a pull rod (31), a limiting rod (32) and a first spring (33). The pull rod (31) has insertion slots (311) at both ends. The limiting rod (32) is slidably inserted into the insertion slots (311). The first spring (33) is located in the insertion slots (311), with one end connected to the bottom wall of the insertion slots (311) and the other end fixedly connected to the limiting rod (32). The hand handle (10) is 'n' shaped. Both ends of the handle (10) have guide grooves (111) along the length direction. One end of the limiting rod (32) is slidably connected in the guide groove (111). The guide groove (111) includes a guide surface (1111) and an unlocking slope (1112). The unlocking slopes (1112) on both sides are not located on the same plane. The limiting rod (32) is provided with an unlocking hole (321) and a limiting hole (322), and the unlocking hole (321) and the limiting hole (322) are connected to each other; The guide rod (21) has a pull end (212) fixed at the end away from the striking head (2). The diameter of the pull end (212) is the same as the diameter of the unlocking hole (321). The diameter of the limiting hole (322) is smaller than the diameter of the pull end (212). The end of the pull end (212) away from the striking head (2) is cone-shaped. The unlocking ramp (1112) is used to drive the limiting rod (32) to slide along the axial direction of the guide groove (111) so that the unlocking hole (321) is facing the pulling end (212), thereby unlocking the pulling end (212).

4. The concrete internal defect detection device according to claim 3, characterized in that, The bottom walls of both the unlocking hole (321) and the limiting hole (322) are provided with guide bevels (3221); And / or, the elastic element (211) includes a second spring (2111), which is sleeved on the guide rod (21) and located inside the housing (1). One end of the second spring (2111) is fixedly connected to the striking head (2) and the other end is fixedly connected to the housing (1).

5. The concrete internal defect detection device according to claim 1, characterized in that, A magnet ring (5) is embedded in the housing (1) at the position where it protrudes from the guide rod (21), and a metal ring (23) that can attract the magnet ring (5) is fixedly provided on the guide rod (21).

6. The concrete internal defect detection device according to claim 1, characterized in that, The sound wave receiver (4) includes a pair of high-sensitivity microphones (41), the sound input ends of the pair of high-sensitivity microphones (41) are respectively arranged facing the striking head (2), the sound output ends of the high-sensitivity microphones (41) are located outside the housing (1), and a noise filtering element is arranged inside the high-sensitivity microphones (41).

7. The concrete internal defect detection device according to claim 1, characterized in that, A rubber ring (6) is fixedly provided circumferentially at the opening position of the housing (1).

8. The concrete internal defect detection device according to claim 1, characterized in that, The opening of the housing (1) is radially tapered inward.

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